One of the hottest rumors in MMA on Friday is that UFC middleweight contender Vitor Belfort failed his UFC on FX 7 pre-fight drug test.

However, Brazilian media outlet Tatame spoke with a doctor in charge of the drug tests submitted to the Brazilian MMA Athletic Commission prior to UFC on FX 7, which took place in Sao Paulo (translation via Bloody Elbow).

This is nothing but the same rumor, we don't have the results yet, they have not come out.All fighters who took the test are subject to it, but the agency that works in partnership with us has not yet finalized the results. The two main event fighters always take the test, then two more fighters on the preliminary card and two of the main. There are six athletes tested, but none of them ever had the test results confirmed and finalized yet," Dr. Marcio Tannure said ... The doctor's prediction is that the agency, which has the name withheld by him, won't release the results of drug tests from UFC Sao Paulo until the 19th of February, a month after the event.

The former UFC light heavyweight champion delivered a vintage head kick TKO knockout over Bisping at the event, notching his record at 185-pounds to 5-1.

The only loss "The Phenom" has suffered at middleweight was an embarrassing highlight-reel knockout at the hands of divisional kingpin Anderson Silva at UFC 126 in Feb. 2011.

Meanwhile, "The Count" entered the bout with five wins in his past six bouts, being promised a title shot against Silva by UFC president Dana White with a win over Belfort.